Electric-arc lamp.



N0. 678,873. Patented luly 23, |9DI. J. A. HEANY.

ELECTRIC AHC LAMP. (Application filed Nov. 14, 1900.) (No Model.)

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@Nimah STATES PATENT Ormea.

JOIIN A. I'IEANY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE TE'IER-I-IEANY DEVELOPING COMPANY, OF SAME PLACE AND CHARLES- TON, WEST VIRGINIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part 0f Letters Patent No. 678,873, dated .Tuly 23, 1901.

Application filed November 14, 1900. Serial No. 36,437. (No model.)

T0 all whom it may concern:

Be it known that I, JOHN A. I-IEANY, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Carbon- Feedin'g Mechanism for Electric-Arc Lamps, of which the following is a specification.

My invention has relation to a mechanism for feeding one of the carbons of` an lelectricarc lamp, and in such connection it relates to the construction and arrangement of such a mechanism.

The principal object of my invention is to provide a clutch or feeding mechanism for the carbon of an arc-lamp which shall be at all times efficient and not liable to disarran gement and shall also be of simple construction. In the accomplishment of this object there is provided a tubular solenoid-core surrounding lthe carbon and adapted to slide up and down on the exterior of said carbon and a magnetic clutch or feed mechanism pivotally connected to the end of the core and adapted to be raised or drawn in one direction to clutch the carbon as soon as the core is magnetized and before the core responds or moves in obedience to the solenoid-coil.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, in which- Figure lis a central vertical sectional View of the feeding mechanism and auxiliary parts embodying main features of my invention, the carbons being illustrated in front elevation. Fig. 2 is a detail View illustrating in front elevation the feeding mechanism. Fig. 3 is a side elevational View of the4 solenoidcore and the magnetic clutch, and Fig. l4 is an underneath plan view of Fig. 3.

Referring to the drawings, a represents the upper carbon, which ordinarily is the one to be fed,and b represents the lower or stationary carbon. The upper carbon o. slides up and downin a tube d, of brassor similarnon-mag-V netic metal. Around the tube cl is fitted the solenoid-core e, which, as shown, consists of a tube of magnetizable metal having at its lower end a collar or {iauge e. The core e slides up and down between the tube d and a concentric tube or tubes f under the control of the solenoid-coil g, which is wrapped around the outer tube or tubes f, as clearly illustrated in Fig. 1. The clutch for the carbon a consists of two members or arms m and m', of which one, on, is fixed by screws or rivets to the under face of the collar c of the core e and has a curved jaw or clamping-face m2 resting always against the carbon o when the carbon is inserted in its tube (Z. The other member m is adapted to rock upon suitable pivots formed in the brackets m3 and m4, projecting downwardly from the collar or ilange e', and also carries a clamping-jaww, of curved outline. The member or arm m is normally supportedin a horizontal position by means of lugs or stops m6, formed on the brackets m3 and m4, as clearly shown in Figs. l and 2, and when in this position the two curved jaws fm2 and m5 lie in the same plane-and form a circular opening of a diameter slightly larger than the diameter of the carbon a. The arm or member m' has at its free end an upwardly-projecting piece m7, formed of a magnetizable metal and adapted when the core e is magnetized to ride upward over a complementally-formed portion c2 of the collar` e and to be seated thereon in the. same manner as an armature is attracted. The movement of the armature piece m7 causes the member m to oscillate and serves to draw its clamping-jaw m5 into a plane at an angle to the stationary jaw m2. In this position of the two jaws m2 and m5 the carbon is tightly gripped and remains tightly gripped nntil'the core CZ is demagnetized.

The operation of the clutch and its auXiliaries is readily understood. So long as the carbons a and b are separated sufficiently to form the arc then the coil g magnetizes the core d sufficiently to cause the movable jaw m5 to clamp the carbon a, and it also has sufficient attraction for the core e to hold 9 said core and carbon a in suspension the re- Vquired distance above the lowercarbon b.

When the arc is broken by the feeding awayv of the carbon a, then the solenoid-coil g is IOO and the member m is released to permit its jaw m5 to turn into the plane of the jaw fm2. The carbon a is thus released and feeds downward toward the carbon Z) to establish the are. When the are is established, the coil g is energized and rst magnetizes the core e and then elevates it. The magnetization of the core e causes the jaws 'm2 and m5 to clamp the carbon a before the core e is elevated by the coil g, and hence when said core responds toits coil the carbon alias been locked to and travels with the core.

Having thus described the nature and object of my invention, what l claim as new, and desire to secure by Letters Patent, is

In an electric-are lamp, a carbon, a solenoid-core surrounding the carbon, a solenoidcoil Controlling said core and adapted to magnetize and to elevate the same, an arm oarried bythe under face of the coro and immovable with respect to the same, said arm having a curved face or clamping-jaw resting against the carbon, a second arnl'pivoted at one end to the immovable arm and having a clamping-face at its pivoted end adapted to normally rest in the sameplane as the curved face of the lirst arm and parallel to the lower end ofthe core, and an armature-piece formed on the free end of the second arm and adapted when the core is magnetized to be ele vated toward said core to draw the clamping-face ont of its normal position, substantially as and for the purposes described.

In testimony whereof I have hereunto set my signature in the presence of two subserib ing Witnesses.

JOI-IN A. HEANY. Witnesses:

J. WALTER DoUGLliss, THOMAS M. SMITH. 

